The CEO says the future will be a world where passengers request an Uber Air on their phone, then head to the rooftop skyports where the aircraft will take off.

Uber is working with NASA to research the safety and efficiency of the skies.

We're working with @Uber to further explore the safety and efficiency of the skies over cities in the future. We'll use airspace management computer modeling and simulations to assess the impacts of small aircraft in these crowded environments. Details: https://t.co/NscauPbtMipic.twitter.com/bfafkiRQmH